The phrase "a vision that could" is correct and usable in written English.
It can be used when discussing potential outcomes or possibilities related to a vision or idea.
Example: "The project presented a vision that could transform the way we approach renewable energy."
Alternatives: "a vision capable of" or "a vision with the potential to".
It's also a vision that could prove hugely profitable.
Answering this question, Robert described a vision that could be discussed openly, not merely guessed at.
What she'd seen was no less than a spirit gift, a vision that could change her life and mine.
It was a vision that could only have come from a London fashion show and had the audience whooping.
Mr. Arlt has talked about doing "The Tempest" in this perfect setting, a vision that could inspire an atoning production.
You have it backwards, the developers are parents of disabled youth themselves — parents who dared to create a vision that could provide for their children after their deaths.
He says that the work belongs to a new genre, one that he calls "a practical utopia," and defines as "a fictional vision that could become a new reality".
In the literary world, it might be described as 'a practical utopia.' I call it a fictional vision that could become a new reality".
Nader has said that he is uncomfortable with that term and instead calls the book a "fictional vision that could become a new reality" (I'm sure Barnes & Noble will be adding a "Fictional Visions → New Realities" section soon).
What's more, Justice Souter's case-by-case approach — his hero was the moderate conservative traditionalist John Marshall Harlan — prevented him from developing a judicial vision that could serve as a rallying cry for legal liberalism.
One official said the refusal of EU leaders at a December summit to give May a 2021 deadline for the end of talks on a future trade deal was grounded in a belief that she had yet to offer a compelling vision that could get through parliament.
